Vertical drop fall is satisfactory for a height upto ___________?
A. 0.5 m
B. 1.5 m
C. 3.5 m
D. 5.0 m
Vertical drop fall is satisfactory for a height upto ___________?
A. 0.5 m
B. 1.5 m
C. 3.5 m
D. 5.0 m